<template>
    <div class="container">
        <div class="login-box">
            <div class="avatar-box">
                <img src="../assets/logo.png" alt="">
            </div>
            <el-form ref="formRef" label-width="0px" :model="form" :rules="rules" class="login-form">
                <el-form-item prop="username">
                    <el-input v-model="form.username" prefix-icon="el-icon-user"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input v-model="form.password" type="password" prefix-icon="el-icon-lock"></el-input>
                </el-form-item>
                <el-form-item class="btns">
                    <el-button type="primary" @click="loginEvent">登录</el-button>
                    <el-button type="info" @click="resetForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>    
</template>

<script>
export default {
    data () {
        return {
            form: {
                username: 'admin',
                password: '123456'
            },
            rules: {
                username: [
                    { required: true, message: '请输入登录名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在3到10个字符之间', trigger: 'blur' }
                ],
                password: [
                    { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 5, max: 15, message: '长度在6到15个字符之间', trigger: 'blur' }
                ]
            }
        }
    },
    methods: {
        resetForm () {
            this.$refs.formRef.resetFields();
        },
        loginEvent () {
            this.$refs.formRef.validate( async res => {
                if(!res) return;
                const { data } = await this.$http.post('login', this.form);
                if (data.meta.status !== 200) {
                    return this.$message.error('登录失败！');
                }  
                this.$message.success('登录成功！');
                
                window.sessionStorage.setItem('token', data.data.token);
                this.$router.push('/home');
            }); 
        }
    }
}
</script>

<style lang="less" scoped>
    .container {
        background-color: #2b4b6b;
        height: 100%;
    }    
    .login-box {
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        
        .avatar-box {
            height: 130px;
            width: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-sizing: border-box;
            box-shadow: 0 0 10px #ddd;
            margin: 0 auto;
            margin-top: -65px;    
            background-color: #fff;    

            img {
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
    }
    .login-form {
        margin: 0 auto;
        margin-top: 30px;
        width: 80%;
    }
    .btns {
        display: flex;
        justify-content: flex-end;
    }
</style>
